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- 15 Feb 2022
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Has anyone known a Grant 26 combi (external) to leak internally into the flame chamber?
For the approx four weeks, every morning the boiler has lost all it's pressure. I refill the system to 1.2 bar, and it kicks back in, and works fine - rads toasty warm and hot water is hot! This may last two hours, or 6 hours, or until following morning; then no pressure.
No signs of leaks at the boiler, round any radiator, or visible pipe work. As I have a full basement, can view nearly all ground floor pipe and first floor leaks would of stained the ceilings by now. I can only think that the 'flame / burn chamber' has split and is leaking in and evaporating away as condensate. Have removed the baffles & burner etc and cant find away signs.
Background - External Grant Eco 26 (2008) oil fire that has worked 'perfectly' during the three years I've lived here. As the property was empty for 7 yrs prior, I have completed the following
- replaced burner / blower assembly
- replaced PRV, flow switch, pressure switch
- replaced one way valves and auto air valves
- replaced PCB, white and black sensor
- replaced heat exchanger and thermal mixing valve
Over three year project the property was piped with new 22mm copper F/R, 15mm copper to new rads. 2 x heat zoning valves & by pass valve fitted.
Any advice appreciated before dropping £3k on new boiler
For the approx four weeks, every morning the boiler has lost all it's pressure. I refill the system to 1.2 bar, and it kicks back in, and works fine - rads toasty warm and hot water is hot! This may last two hours, or 6 hours, or until following morning; then no pressure.
No signs of leaks at the boiler, round any radiator, or visible pipe work. As I have a full basement, can view nearly all ground floor pipe and first floor leaks would of stained the ceilings by now. I can only think that the 'flame / burn chamber' has split and is leaking in and evaporating away as condensate. Have removed the baffles & burner etc and cant find away signs.
Background - External Grant Eco 26 (2008) oil fire that has worked 'perfectly' during the three years I've lived here. As the property was empty for 7 yrs prior, I have completed the following
- replaced burner / blower assembly
- replaced PRV, flow switch, pressure switch
- replaced one way valves and auto air valves
- replaced PCB, white and black sensor
- replaced heat exchanger and thermal mixing valve
Over three year project the property was piped with new 22mm copper F/R, 15mm copper to new rads. 2 x heat zoning valves & by pass valve fitted.
Any advice appreciated before dropping £3k on new boiler
